CN108882368B - Indication method, determination method and device for configuration information of frame structure - Google Patents

Abstract

The invention provides an indication method, a determination method and a device of configuration information of a frame structure, wherein the method comprises the following steps: sending indication information of the guard interval length of the target subframe to a terminal; transmitting the configuration information of the target subframe on a downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information; in the method provided by the embodiment of the invention, the user can dynamically determine the internal configuration structure of the target subframe according to the configuration information and the length of the guard interval, so that the service transmission characteristics can be better adapted, and flexible retransmission feedback and link self-adaption processes can be realized, thereby improving the system capacity and reducing the transmission delay.

Description

Indication method, determination method and device for configuration information of frame structure

technical field

The present invention relates to the field of communication technologies, and in particular, to an indication method, a determination method and an apparatus for configuration information of a frame structure.

Background technique

In order to better meet service requirements and cover multiple scenarios, the existing TD-LTE defines multiple uplink and downlink ratios to support uplink and downlink services with different ratios, and defines a variety of special subframe configurations to support different Cell coverage.

In order to realize more flexible frame structure configuration and reduce transmission delay, 3GPP NR discusses the basic unit of frame structure. It is determined that a subframe unit may include full downlink transmission, full uplink transmission, or at least one uplink transmission part and one downlink transmission part. That is, there may be three types of subframes: all uplink subframes, all downlink subframes, and bidirectional transmission subframes (there are both uplink transmission and downlink transmission). These three subframes can be flexibly combined to form a frame structure to meet the requirements of different service scenarios. Compared with LTE, 3GPP NR introduces bidirectional subframes. Using bidirectional subframes, users can quickly realize uplink scheduling transmission and feedback ACK/NACK information quickly, achieving lower transmission delay and faster link adaptation. process to improve system performance. For bidirectional subframes, in order to avoid uplink and downlink interference, a guard period (GP) is generally inserted between the row transmission and the uplink transmission part. The time length of both uplink transmission and downlink transmission should be flexibly configurable. Therefore, there may also be multiple flexible configurations of bidirectional subframes. Figures 1 to 4 respectively show schematic diagrams of several possible bidirectional subframe configurations; wherein, D is an OFDM symbol for downlink transmission, and U is an OFDM symbol for uplink transmission.

Generally, the flexible frame structure of NR can be indicated in a completely flexible and dynamic manner or in a semi-static manner. A common completely flexible and dynamic indication method may be: indicating the duration of downlink and the starting position of uplink transmission in the downlink control part at the beginning of the subframe. The configuration structure of the subframe is determined by indicating these contents in each subframe. The semi-static indication mode may be similar to LTE, in which multiple possible configuration modes are defined for a frame (including multiple subframes) in advance, and then the base station broadcasts the configuration type to the UE. For example, in TD-LTE, 7 kinds of uplink and downlink configurations and 9 kinds of special subframe configurations are defined. The TD-LTE system informs the UE of the frame structure type by broadcasting the uplink and downlink configuration and special subframe configuration [1].

At present, the fully flexible and dynamic indication method of the NR frame structure can fully dynamically configure the frame structure, but the downlink control part at the beginning of each subframe needs to indicate the downlink duration and the starting position of the uplink transmission, and the signaling overhead is large. Taking a subframe containing 14 OFDM symbols as an example, in order to achieve a completely flexible configuration, 4 bits are required to indicate the duration of the downlink, and 4 bits to indicate the position of the start of the uplink, and each subframe needs 8 bits of indication information. The semi-static indication method usually has lower signaling indication overhead, because a limited number of frame structure configurations (uplink and downlink configuration and GP configuration, etc.) are generally determined, and the limited types of configurations can be indicated. However, the semi-static configuration can only include limited uplink and downlink configuration, bidirectional subframe types and subframe combination methods, which may not be able to better match the characteristics of services and affect the transmission delay.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an indication method, determination method and device for configuration information of a frame structure, which solves the problem in the prior art that the terminal cannot accurately determine the downlink and uplink ratios in bidirectional subframes.

In order to achieve the above object, the present invention provides a method for indicating configuration information of a frame structure, including:

sending the indication information of the guard interval length of the target subframe to the terminal;

The configuration information of the target subframe is transmitted on the downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.

Wherein, the step of sending the indication information of the guard interval length of the target subframe to the terminal includes:

Broadcast the indication information of the guard interval length of the target subframe on the system broadcast channel; or, carry the indication information of the guard interval length of the target subframe in the system information and send the system information.

Wherein, before the step of sending the indication information of the guard interval length of the target subframe to the terminal, the method further includes:

Various guard interval lengths are configured according to cell coverage requirements, radio frequency uplink and downlink switching time, and/or system antenna calibration requirements for guard interval lengths.

Wherein, the step of sending the configuration information of the target subframe to the terminal on the downlink control channel of the target subframe includes:

On the downlink control channel of the target subframe, the configuration information of the target subframe is sent to the terminal in real time.

The configuration information of the target subframe includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, The end position of the guard interval in the target subframe.

An embodiment of the present invention also provides a method for determining a frame structure, including:

obtaining the guard interval length of the target subframe, and receiving the configuration information of the target subframe on the downlink control channel of the target subframe;

The frame structure of the target subframe is determined according to the configuration information of the target subframe and the guard interval length of the target subframe.

Wherein, the step of obtaining the guard interval length of the target subframe includes:

Obtain the indication information of the guard interval length of the target subframe broadcast by the system broadcast channel; or obtain the indication information of the guard interval length of the target subframe carried in the system information;

According to the indication information, the guard interval length of the target subframe is determined.

The configuration information of the target subframe includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, The end position of the guard interval in the target subframe.

Wherein, the step of determining the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe includes:

If the guard interval length of the target subframe is equal to 0, determine that the frame structure of the target subframe is an all-downlink subframe or an all-uplink subframe according to the configuration information of the target subframe;

If the guard interval length of the target subframe is not equal to 0, determine that the frame structure of the target subframe is a bidirectional subframe, and determine the position of uplink transmission in the bidirectional subframe according to the configuration information of the target subframe and the location of the downstream transmission.

An embodiment of the present invention also provides an indication device for configuration information of a frame structure, including:

an interval sending module, configured to send the indication information of the guard interval length of the target subframe to the terminal;

A configuration sending module, configured to transmit the configuration information of the target subframe on the downlink control channel of the target subframe, so that the terminal can determine the frame of the target subframe according to the configuration information of the target subframe and the indication information structure.

Wherein, the interval sending module includes:

a first interval sending submodule, configured to broadcast the indication information of the guard interval length of the target subframe on the system broadcast channel; or,

The second interval sending submodule is configured to carry the indication information of the guard interval length of the target subframe in the system information and send the system information.

Wherein, the device also includes:

The configuration module is used to configure various guard interval lengths according to cell coverage requirements, radio frequency uplink and downlink switching time and/or the requirements for guard interval lengths from system antenna calibration.

Wherein, the configuration sending module includes:

The configuration sending submodule is configured to send the configuration information of the target subframe to the terminal in real time on the downlink control channel of the target subframe.

The configuration information of the target subframe includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, The end position of the guard interval in the target subframe.

The embodiment of the present invention also provides a frame structure determination device, including:

an obtaining module, configured to obtain the guard interval length of the target subframe, and receive the configuration information of the target subframe on the downlink control channel of the target subframe;

A determining module, configured to determine the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe.

Wherein, the acquisition module includes:

a first obtaining submodule, configured to obtain the indication information of the guard interval length of the target subframe broadcast by the system broadcast channel; or obtain the indication information of the guard interval length of the target subframe carried in the system information;

The second obtaining submodule is configured to determine the guard interval length of the target subframe according to the indication information.

The configuration information of the target subframe includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, The end position of the guard interval in the target subframe.

Wherein, the determining module includes:

a first determining submodule, configured to determine, according to the configuration information of the target subframe, that the frame structure of the target subframe is an all-downlink subframe or an all-uplink subframe if the guard interval length of the target subframe is equal to 0;

The second determination submodule is configured to determine that the frame structure of the target subframe is a bidirectional subframe if the guard interval length of the target subframe is not equal to 0, and determine the target subframe according to the configuration information of the target subframe. The location of uplink transmission and the location of downlink transmission in bidirectional subframes.

The above-mentioned technical scheme of the present invention has at least the following beneficial effects:

In the method for indicating the configuration information of the frame structure, the method for determining the configuration information, and the device according to the embodiments of the present invention, the base station side pre-configures various guard interval lengths of the frame and broadcasts the indication information of the guard interval length of the target subframe to the user, and simultaneously broadcasts the target subframe guard interval length to the user. The configuration information of the subframe is dynamically sent to the user, and the user can dynamically determine the internal configuration structure of the target subframe according to its configuration information and the length of the guard interval, so as to better adapt to the service transmission characteristics and realize flexible retransmission feedback and link Adaptive process to increase system capacity and reduce transmission delay.

Description of drawings

1 shows one of the schematic diagrams of bidirectional subframe configuration in the prior art;

FIG. 2 shows the second schematic diagram of bidirectional subframe configuration in the prior art;

FIG. 3 shows the third schematic diagram of bidirectional subframe configuration in the prior art;

FIG. 4 shows the fourth schematic diagram of bidirectional subframe configuration in the prior art;

5 is a flowchart showing the steps of a method for indicating configuration information of a frame structure provided by an embodiment of the present invention;

6 shows a schematic structural diagram of a subframe determined by using a method for indicating configuration information of a frame structure provided by an embodiment of the present invention;

FIG. 7 shows a flowchart of steps of a method for determining a frame structure provided by an embodiment of the present invention;

8 is a schematic structural diagram of an apparatus for indicating configuration information of a frame structure provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an apparatus for determining a frame structure provided by an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 5 , an embodiment of the present invention provides a method for indicating configuration information of a frame structure, which is applied to the base station side (ie, the network side), including:

Step 11, sending the indication information of the guard interval length of the target subframe to the terminal;

Step 12: Transmit the configuration information of the target subframe on the downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.

In the above-mentioned embodiment of the present invention, the base station broadcasts the indication information of the guard interval length of the target subframe, and the terminal can determine the guard interval length of the target subframe according to the indication information; it should be noted that the guard interval length of the target subframe is the length of the guard interval of the base station predefined. Further, the base station also sends configuration information of the target subframe on the downlink control channel of the target subframe. Specifically, the configuration information includes: the duration of the downlink transmission in the target subframe; or, the start time of the uplink transmission in the target subframe. the starting position; or, the starting position of the guard interval in the target subframe; or, the ending position of the guard interval in the target subframe.

Then the user can further determine the location and time length of the uplink transmission according to the duration of the downlink transmission in the downlink control channel and the length of the GP; through this flexible configuration, each subframe can determine that its type is a full downlink subframe. , or all uplink subframes, or bidirectional subframes and determine the internal configuration structure of bidirectional subframes, thereby realizing flexible configuration.

Specifically, step 11 in the above-mentioned embodiment of the present invention includes:

Broadcast the indication information of the guard interval length of the target subframe on the system broadcast channel; or, carry the indication information of the guard interval length of the target subframe in the system information and send the system information. For example, 1-bit indication information is used in the system broadcast channel or system information to indicate the length of the guard interval; for example, 0 indicates that GP1 is configured with a length of 1 ofdm symbol; 1 indicates that GP2 is configured with a length of 7 ofdm symbols.

It should be noted that, several bits of indication information are specifically used to indicate the guard interval length, which may be determined according to the number of preconfigured guard interval lengths. For example, if two kinds of guard interval lengths are preconfigured, 1 bit of information is used to indicate the length of the guard interval; for another example, if three or four kinds of guard interval lengths are preconfigured, 2 bits of information are used to indicate the length of the guard interval, which will not be enumerated here.

And in the above-mentioned embodiment of the present invention, before step 11, the method further includes:

Various guard interval lengths are configured according to cell coverage requirements, radio frequency uplink and downlink switching time, and/or system antenna calibration requirements for guard interval lengths.

That is, in the above-mentioned embodiments of the present invention, the GP length configuration is jointly determined according to factors such as cell coverage requirements, radio frequency uplink/downlink switching time, and GP length requirements for system antenna calibration.

Specifically, in the above embodiment of the present invention, step 12 includes:

On the downlink control channel of the target subframe, the configuration information of the target subframe is sent to the terminal in real time.

In the above embodiments of the present invention, sending configuration information in real time specifically refers to sending the configuration information of the subframe on the downlink control channel of each subframe respectively; when the configuration information of different subframes is different, the dynamic sending of the configuration information is realized; It should be noted that the configuration information of different subframes may be the same or different, which is not specifically limited here.

Specifically, 4 bits of information are occupied on the downlink control channel to indicate the configuration information of the subframe. For example, the configuration information is the duration of downlink transmission. When the 4-bit information is "1011", it indicates the duration of downlink transmission of the target subframe. for 11 ofdm symbols. There are no examples here.

It should be noted that, several bits of information are specifically used to indicate the configuration information, which needs to be determined according to the specific content and length of the configuration information, which is not specifically limited here.

An example is as follows:

Considering that the system subcarrier interval is 15KHz, 1 subframe contains 14 OFDM symbols, and the system has two GP length configurations, GP1 occupies 1OFDM symbol (including cyclic prefix length), GP2 occupies 7OFDM symbols (including cyclic prefix length), of which GP1 can To meet the needs of most coverage such as indoor hot spots, dense urban areas, and suburbs, GP2 can meet larger coverage such as 100Km cell coverage. The specific signaling notification steps can be as follows:

The base station broadcasts 1 bit of GP configuration information, "0" indicates that GP1 is configured, and "1" indicates that GP2 is configured.

The base station sends 4 bits on the downlink control channel of each subframe to indicate the duration of downlink transmission in one subframe. For example, 1011 indicates that the downlink in this subframe lasts for 11 OFDM symbols. When the GP1 configuration is adopted, the structure of the subframe is shown in FIG. 6 , where D is an OFDM symbol for downlink transmission, and U is an OFDM symbol for uplink transmission.

To sum up, in the method for indicating the configuration information of the frame structure provided by the above-mentioned embodiments of the present invention, by pre-configuring various guard interval lengths of the frame and broadcasting to the user, and at the same time dynamically sending the configuration information of the target subframe to the user, then Users can dynamically determine the internal configuration structure of the target subframe according to its configuration information and guard interval length to better adapt to service transmission characteristics and implement flexible retransmission feedback and link adaptation processes to improve system capacity and reduce transmission time delay.

As shown in FIG. 7 , an embodiment of the present invention further provides a method for determining a frame structure, which is applied to the terminal side, including:

Step 21, obtaining the guard interval length of the target subframe, and receiving the configuration information of the target subframe on the downlink control channel of the target subframe;

Step 22: Determine the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe.

In the above-mentioned embodiment of the present invention, the base station predefines multiple possible configurations of guard interval lengths (ie, GP lengths), and sends the configured multiple GP lengths to the terminal. And the base station also sends the configuration information of the target subframe on the downlink control channel of the target subframe.

Specifically, step 21 includes:

Obtain the indication information of the guard interval length of the target subframe broadcast by the system broadcast channel; or obtain the indication information of the guard interval length of the target subframe carried in the system information.

And the configuration information of the target subframe includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, the target subframe The end position of the guard interval in the subframe.

Then the user can further determine the location and time length of the uplink transmission according to the duration of the downlink transmission in the downlink control channel and the length of the GP; through this flexible configuration, each subframe can determine that its type is a full downlink subframe. , or all uplink subframes, or bidirectional subframes and determine the internal configuration structure of bidirectional subframes, thereby realizing flexible configuration.

Specifically, step 22 in the above embodiment of the present invention includes:

If the guard interval length of the target subframe is equal to 0, determine that the frame structure of the target subframe is an all-downlink subframe or an all-uplink subframe according to the configuration information of the target subframe;

If the guard interval length of the target subframe is not equal to 0, determine that the frame structure of the target subframe is a bidirectional subframe, and determine the position of uplink transmission in the bidirectional subframe according to the configuration information of the target subframe and the location of the downstream transmission.

To sum up, in the method for determining the frame structure provided by the above-mentioned embodiments of the present invention, the user obtains various guard interval lengths of the frame pre-configured by the base station, and simultaneously receives the configuration information of the target subframe sent by the base station. and the guard interval length to dynamically determine the internal configuration structure of the target subframe to better adapt to service transmission characteristics and implement flexible retransmission feedback and link adaptation processes to improve system capacity and reduce transmission delay.

As shown in FIG. 8 , an embodiment of the present invention further provides a device for indicating configuration information of a frame structure, including:

an interval sending module 31, configured to send the indication information of the guard interval length of the target subframe to the terminal;

The configuration sending module 32 is configured to transmit the configuration information of the target subframe on the downlink control channel of the target subframe, so that the terminal can determine the configuration information of the target subframe according to the configuration information of the target subframe and the indication information. frame structure.

Specifically, the interval sending module in the above-mentioned embodiment of the present invention includes:

a first interval sending submodule, configured to broadcast the indication information of the guard interval length of the target subframe on the system broadcast channel; or,

The second interval sending submodule is configured to carry the indication information of the guard interval length of the target subframe in the system information and send the system information.

Specifically, the device in the above-mentioned embodiment of the present invention further includes:

The configuration module is used to configure various guard interval lengths according to cell coverage requirements, radio frequency uplink and downlink switching time, and/or system antenna calibration requirements for guard interval lengths.

Specifically, the configuration sending module described in the foregoing embodiment of the present invention includes:

The configuration sending submodule is configured to send the configuration information of the target subframe to the terminal in real time on the downlink control channel of the target subframe.

Specifically, the configuration information of the target subframe in the above-mentioned embodiment of the present invention includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the protection in the target subframe The start position of the interval; or, the end position of the guard interval in the target subframe.

To sum up, in the device for indicating the configuration information of the frame structure provided by the above-mentioned embodiments of the present invention, by pre-configuring various guard interval lengths of the frame and broadcasting to the user, and at the same time dynamically sending the configuration information of the target subframe to the user, then Users can dynamically determine the internal configuration structure of the target subframe according to its configuration information and guard interval length to better adapt to service transmission characteristics and implement flexible retransmission feedback and link adaptation processes to improve system capacity and reduce transmission time delay.

As shown in FIG. 9 , an embodiment of the present invention further provides an apparatus for determining a frame structure, including:

an obtaining module 41, configured to obtain the guard interval length of the target subframe, and receive the configuration information of the target subframe on the downlink control channel of the target subframe;

The determining module 42 is configured to determine the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe.

Specifically, the acquisition module in the above-mentioned embodiment of the present invention includes:

a first obtaining submodule, configured to obtain the indication information of the guard interval length of the target subframe broadcast by the system broadcast channel; or obtain the indication information of the guard interval length of the target subframe carried in the system information;

The second obtaining submodule is configured to determine the guard interval length of the target subframe according to the indication information.

Specifically, the configuration information of the target subframe in the above-mentioned embodiment of the present invention includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the protection in the target subframe The start position of the interval; or, the end position of the guard interval in the target subframe.

Specifically, the determining module in the above-mentioned embodiment of the present invention includes:

a first determining submodule, configured to determine that the frame structure of the target subframe is an all-downlink subframe or an all-uplink subframe according to the configuration information of the target subframe if the guard interval length of the target subframe is equal to 0;

The second determination submodule is configured to determine that the frame structure of the target subframe is a bidirectional subframe if the guard interval length of the target subframe is not equal to 0, and determine the target subframe according to the configuration information of the target subframe. The location of uplink transmission and the location of downlink transmission in bidirectional subframes.

To sum up, in the apparatus for determining the frame structure provided by the above embodiments of the present invention, the user obtains various guard interval lengths of the frame pre-configured by the base station, and simultaneously receives the configuration information of the target subframe sent by the base station. and the guard interval length to dynamically determine the internal configuration structure of the target subframe to better adapt to service transmission characteristics and implement flexible retransmission feedback and link adaptation processes to improve system capacity and reduce transmission delay.

The above is the preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (14)

1. an indication method of the configuration information of a frame structure, is characterized in that, comprises: sending the indication information of the guard interval length of the target subframe to the terminal; transmitting the configuration information of the target subframe on the downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information; The configuration information includes: the duration of the downlink transmission in the target subframe; or, the starting position of the uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, the guard interval in the target subframe end position. 2. The method according to claim 1, wherein the step of sending the indication information of the guard interval length of the target subframe to the terminal comprises: Broadcast the indication information of the guard interval length of the target subframe on the system broadcast channel; or, carry the indication information of the guard interval length of the target subframe in the system information and send the system information. 3. The method according to claim 1, wherein before the step of sending the indication information of the guard interval length of the target subframe to the terminal, the method further comprises: Various guard interval lengths are configured according to cell coverage requirements, radio frequency uplink and downlink switching time, and/or system antenna calibration requirements for guard interval lengths. 4. The method according to claim 1, wherein the step of sending the configuration information of the target subframe to the terminal on the downlink control channel of the target subframe comprises: On the downlink control channel of the target subframe, the configuration information of the target subframe is sent to the terminal in real time. 5. A method for determining a frame structure, comprising: obtaining the guard interval length of the target subframe, and receiving the configuration information of the target subframe on the downlink control channel of the target subframe; determining the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe; The configuration information includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, the guard interval in the target subframe end position. 6. The method according to claim 5, wherein the step of obtaining the guard interval length of the target subframe comprises: Obtain the indication information of the guard interval length of the target subframe broadcast by the system broadcast channel; or obtain the indication information of the guard interval length of the target subframe carried in the system information; According to the indication information, the guard interval length of the target subframe is determined. 7. The method according to claim 5, wherein the step of determining the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe comprises the following steps: : If the guard interval length of the target subframe is equal to 0, determine that the frame structure of the target subframe is an all-downlink subframe or an all-uplink subframe according to the configuration information of the target subframe; If the guard interval length of the target subframe is not equal to 0, determine that the frame structure of the target subframe is a bidirectional subframe, and determine the position of uplink transmission in the bidirectional subframe according to the configuration information of the target subframe and the location of the downstream transmission. 8. A device for indicating configuration information of a frame structure, comprising: an interval sending module, configured to send the indication information of the guard interval length of the target subframe to the terminal; A configuration sending module, configured to transmit the configuration information of the target subframe on the downlink control channel of the target subframe, so that the terminal can determine the frame of the target subframe according to the configuration information of the target subframe and the indication information structure; the configuration information includes: the duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, the starting position of the guard interval in the target subframe; The end position of the guard interval. 9. The apparatus according to claim 8, wherein the interval sending module comprises: a first interval sending submodule, configured to broadcast the indication information of the guard interval length of the target subframe on the system broadcast channel; or, The second interval sending submodule is configured to carry the indication information of the guard interval length of the target subframe in the system information and send the system information. 10. The apparatus of claim 8, wherein the apparatus further comprises: The configuration module is used to configure various guard interval lengths according to cell coverage requirements, radio frequency uplink and downlink switching time and/or the requirements for guard interval lengths from system antenna calibration. 11. The apparatus according to claim 8, wherein the configuration sending module comprises: The configuration sending submodule is configured to send the configuration information of the target subframe to the terminal in real time on the downlink control channel of the target subframe. 12. A device for determining a frame structure, comprising: an obtaining module, configured to obtain the guard interval length of the target subframe, and receive the configuration information of the target subframe on the downlink control channel of the target subframe; a determining module, configured to determine the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe; the configuration information includes: the duration of downlink transmission in the target subframe ; or, the starting position of the uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or, the ending position of the guard interval in the target subframe. 13. The apparatus according to claim 12, wherein the acquiring module comprises: a first obtaining submodule, configured to obtain the indication information of the guard interval length of the target subframe broadcast by the system broadcast channel; or obtain the indication information of the guard interval length of the target subframe carried in the system information; The second obtaining submodule is configured to determine the guard interval length of the target subframe according to the indication information. 14. The apparatus according to claim 12, wherein the determining module comprises: a first determining submodule, configured to determine, according to the configuration information of the target subframe, that the frame structure of the target subframe is an all-downlink subframe or an all-uplink subframe if the guard interval length of the target subframe is equal to 0; The second determination submodule is configured to determine that the frame structure of the target subframe is a bidirectional subframe if the guard interval length of the target subframe is not equal to 0, and determine the target subframe according to the configuration information of the target subframe. The location of uplink transmission and the location of downlink transmission in bidirectional subframes.

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